diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/mmc.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 907c418..37719d2 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1507,6 +1507,27 @@ int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access) } /* + * Modify EXT_CSD[177] which is BOOT_BUS_WIDTH + * based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH + * and BOOT_MODE. + * + * Returns 0 on success. + */ +int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode) +{ + int err; + + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH, + EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) | + EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) | + EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width)); + + if (err) + return err; + return 0; +} + +/* * Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG) * based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and * PARTITION_ACCESS. |